• Applied Chemistry for Engineering
• /
• v.20 no.3
• /
• pp.266-272
• /
• 2009

Physical and chemical properties of waste LCD glass were investigated to test the feasibility of feed materials for the production of foamed glass. For this study, chemical analysis, thermal analysis, rheological consideration with the viscosity change under high temperature and thermal expansion coefficient were carried out and the trial production of foamed glass as; in spherical and block type also attempted. All results showed waste LCD glass would be a good feed material for the production of foamed glass and foaming technology of LCD glass would be an effective recycling alternative.

• Applied Chemistry for Engineering
• /
• v.23 no.2
• /
• pp.195-203
• /
• 2012

Recycling method of waste LCD glass is the essential process for developing the total recycling process of LCD pannel. Pulverizing of LCD glass, determination of proper carbonacious foaming agent, the properties of residue from the recovery of valuable materials through an acid leaching process and the feasibility for the foaming of the residue obtained from leaching for indium and tin recovery were investigated for the developing of recycling method of waste LCD glass as industrial feed materials, such as heat insulation materials, sound absorbing materials, carrier of water treatment. Waste LCD glass could be pulverized finely for foaming process. Natural graphite was proper agent for foaming of the residue and the foaming technology of LCD glass would be effective recycling alternatives.

• Applied Chemistry for Engineering
• /
• v.28 no.5
• /
• pp.521-528
• /
• 2017

To find a recycling method for waste liquid crystal display (LCD) panel glasses, we investigated the synthesis process of zeolite with an ion exchange ability by hydrothermal reaction using waste LCD panel glass as a raw material. It was shown that the waste LCD panel glass can be used as a raw material for the production of zeolites having the ion exchange ability. Following conditions for the synthesis of the zeolite with an ion exchange ability were required : the molar ratio of Si to Al components of the waste LCD glass needs to be 2.0 to 2.8, and the temperature of $100^{\circ}C$ and reaction time of 12 hours are needed for the hydrothermal reaction. Based on the required conditions previously mentioned, the A type zeolite was synthesized when the molar ratio of the Si to Al component was 2.0, and the P type zeolite was produced when the molar ratio was 2.8. The type A zeolite synthesized by using the waste LCD panel glass showed a good ion exchange ability and heavy metal adsorption ability. Also, an excellent ion exchange capacity was observed as the crystal phase grows stably in a cubic phase.

• Applied Chemistry for Engineering
• /
• v.27 no.4
• /
• pp.371-379
• /
• 2016

In this article, the foamed body of glass was manufactured from the waste borosilicate glass produced by wet pulverization process without additional pretreatment which can be used as a recycling method for waste LCD panel glass. Each 100 g of pulverized waste borosilicate glass with the size of less than 270 mesh were mixed with 0.3 weight fraction of carbon and 1.5 weight fraction of $Na_2CO_3$, $Na_2SO_4$ and $CaCO_3$ and let them foamed for 20 minutes at $950^{\circ}C$ to manufacture the foamed body having the density of less than $0.3g/cm^3$. Additionally, adding $SiO_2$ or $H_3BO_3$ to the mixture enabled the foamed body to have efficient formation of open pores which showed the possibility for producing the foamed body with new functionalities such as sound absorption.

• Proceedings of the Korea Concrete Institute Conference
• /
• 2010.05a
• /
• pp.319-320
• /
• 2010

This Study aimed to investigate fundamental properties of PHC pile using waste TFT-LCD glass powder. Through the present study, waste TFT-LCD glass powder may be taken into consideration for the application of mineral admixture for PHC pile.

• Applied Chemistry for Engineering
• /
• v.16 no.3
• /
• pp.440-448
• /
• 2005

Physical and chemical properties of waste glass, such as bottle glass, plate glass, and LCD glass were investigated to test the feasibility of starting materials for the production of high quality foamed glass for insulating grade construction material without pre-treatments such as cleaning, and waste removals. For this purpose, chemical analysis, thermal analysis, crystalline analysis, and rheological analysis including viscosity were proceeded and the preparation of foamed glass under the qualitative conditions obtained from these various analysis was also attempted. Overall results of various analysis and investigations for these waste glass showed that waste bottle glass and plate glass have high possivility of use as feed materials for the production of foamed glass.

• Resources Recycling
• /
• v.24 no.1
• /
• pp.58-65
• /
• 2015

Although Korea is a top market sharing and world leading producer and developer of flat panel display devices, relevant recycling technology is not up to her prestigious status. Besides, most of the waste glass arising from flat panel displays is currently land-filled. The present paper mainly reviews on development of recycling systems for waste TFT-LCD glass from end-of-life LCD TVs and monitors and TFT-LCD process waste of crushed glass particles with target end uses of raw material for high strength concrete pile and glass fibers, respectively. Waste LCD glass was recycled to fabricate ingredients for high strength concrete piles with enhanced physical properties and spherical foam products. The waste LCD glass recycling technology is already developed to fabricate long and short fibers at commercial level. In view of these, future R & D on waste LCD glass materials is to be directed toward implementation of commercial materials recycling system therefrom.

• Proceedings of the Korea Water Resources Association Conference
• /
• 2009.05a
• /
• pp.1817-1821
• /
• 2009

최근 전자제품 사용의 증가로 인해 버려지는 전자제품의 양도 함께 증가하고 있으며 이렇게 늘어난 전자폐기물이 부적절한 방식으로 처리될 경우 우리에게 악영향을 미치는 위험물질이 될 수 있다. 본 연구에서는 이러한 전자폐기물 중 하나인 폐 LCD 유리를 이용한 수질정화용 여재를 이용하여 전자폐기물에 의한 오염을 줄이고, 동시에 강우시 표면 유출로 인하여 발생되는 비점오염을 제어하고자 하였다. 본 연구에서 이용한 수처리 여재는 기존 수처리 여재의 단점을 보완하는 대체 여재 개발이라는 목적에 적합할 것으로 판단된다. 이에 본 연구에서 발포기술이 적용된 폐 LCD 유리 여재의 비점오염에 의한 수질정화능력평가를 하기 위해 실험 장치를 구성하여 실험하였다. 반응조는 직경 0.10 m, 높이 0.75 m 크기(총용량= 5.89 $\ell$)로 두께 10mm의 투명 아크릴판으로 3조를 제작하였다. 유입수는 미량 펌프를 이용하여 유입하였다. 각 반응조의 체류시간에 의한 수질정화능력을 평가하였다. 연구 결과, 오염물질에 대한 제거효율 범위는 SS $64.1%\sim88.2%$, BOD $29.8\sim52.4%$, COD $56.8\sim66.1%$, T-N $39.4\sim\;52.3%$, T-P $14.1\sim36.8%$로 나타났다. 체류시간이 가장 길었던 반응조의 경우, 대부분의 측정항목에서 높은 처리 효율을 볼 수 있었다. 초기에 처리 효율이 낮은 것은 미생물이 부착되지 않았기 때문이라고 판단되며, 실험의 중반과 후반에서 미생물이 부착이 되는 시점부터 높은 처리효율을 보이는 것으로 나타났다.

• Resources Recycling
• /
• v.29 no.6
• /
• pp.57-64
• /
• 2020

In this study, removal of OCA and organic impurities for recycling LCD touch panel glass was conducted by mechanical and chemical dissolution methode. Cut mill and oscillation mill were used for mechanical crushing of touch panel, and water, ethanol, dichloromethane were used to remove OCA and organic impurities. As a result of TGA, when applied only dicloromethane in the process, the efficiency of organic removal was to be best. In addition, removal effect of organic impurities increased as the cleaning temperature increased. As a result of zeta potential analysis to confirm the dispersion degree of touch panel glass in the solvent, the absolute value of the zeta potenial of water with the lowest cleaning effect was lower than other solvents, and it was confirmed that efficiency of organic removal is affected not only by the chemical dissolution properties but also the physical dispersion properties in the solvent.

• Applied Chemistry for Engineering
• /
• v.27 no.6
• /
• pp.612-619
• /
• 2016

In this research, an alumino-borosilicate foamed glass with sound absorption property was prepared using the waste borosilicate glass obtained from the recycling process of waste liquid crystal display (LCD) panel. A 100 g of pulverized waste borosilicate glass with the particle size of under 325 mesh, was mixed with 0.3 g (wt/wt) of graphite, each 1.5 g (wt/wt) of $Na_2CO_3$, $Na_2SO_4$ and $CaCO_3$ as a foaming agent, and 6.0 g (wt/wt) of $H_3BO_3$ and 3.0 g (wt/wt) of $Al_2O_3$ as a pore control agent. Following mixture was under the foaming process for 20 minutes at a foaming temperature of $950^{\circ}C$. The result yielded the foaming agent with 45% of the opened porosity and 0.5-0.7 of the sound absorbing coefficient. This alumino-borosilicate foamed glass with the sound absorption property showed excellent physical and mechanical properties such as density of $0.21g/cm^3$, bending strength of $55N/cm^2$ and compression strength of $298N/cm^2$ which can be ideally used as sound absorption materials with heat-resisting and chemical-resisting property.